阅读说明：本技术 一种米饭分发机 (Rice distributor ) 是由 玉置正彦 于 2019-11-27 设计创作，主要内容包括：本发明公开了一种米饭分发机,包括主体机架,包括：设置在所述主体机架上的储饭料斗、分饭传送机构、定量分饭机构与控制组件；所述储饭料斗包括上漏斗与下漏斗；所述控制组件包括控制器以及与所述控制器连接的第一电机；所述分饭传送机构包括搅拌棒、位于所述搅拌棒下方的送料棒以及位于所述送料棒下方的分料棒,所述分料棒还位于所述下漏斗的进料口处,所述搅拌棒、送料棒以及分料棒通过齿轮与所述第一电机连接；所述定量分饭机构包括盛饭器以及与所述盛饭器连接的称重机构,所述盛饭器位于所述下漏斗的下方,且正对于所述下漏斗的出料口,并对所述盛饭器中的米饭进行定量称量。本发明的有益效果在于：可以提高米饭分发效率与准确度。(The invention discloses a rice distributor, which comprises a main frame, comprising: the rice storage hopper, the rice distribution conveying mechanism, the quantitative rice distribution mechanism and the control assembly are arranged on the main body frame; the rice storage hopper comprises an upper hopper and a lower hopper; the control assembly comprises a controller and a first motor connected with the controller; the rice distribution conveying mechanism comprises a stirring rod, a feeding rod and a distribution rod, the feeding rod is positioned below the stirring rod, the distribution rod is positioned below the feeding rod, the distribution rod is also positioned at a feed inlet of the lower hopper, and the stirring rod, the feeding rod and the distribution rod are connected with the first motor through gears; the quantitative rice distribution mechanism comprises a rice container and a weighing mechanism connected with the rice container, the rice container is positioned below the lower funnel and right opposite to the discharge hole of the lower funnel, and the rice in the rice container is quantitatively weighed. The invention has the beneficial effects that: the efficiency and accuracy of rice distribution can be improved.)

1. A rice dispensing machine, comprising a main body frame, characterized by comprising: the rice storage hopper, the rice distribution conveying mechanism, the quantitative rice distribution mechanism and the control assembly are arranged on the main body frame;

the rice storage hopper comprises an upper hopper and a lower hopper;

the control assembly comprises a controller and a first motor connected with the controller;

the rice distribution conveying mechanism is arranged in the upper hopper and comprises a stirring rod, a feeding rod positioned below the stirring rod and a distribution rod positioned below the feeding rod, the distribution rod is also positioned at a feed inlet of the lower hopper, and the stirring rod, the feeding rod and the distribution rod are connected with the first motor through gears so as to drive the stirring rod, the feeding rod and the distribution rod to rotate when the first motor rotates;

the quantitative rice distribution mechanism comprises a rice container and a weighing mechanism, the rice container is located below the lower funnel and is right opposite to the discharge hole of the lower funnel, and the weighing mechanism is connected with the rice container and is used for quantitatively weighing rice in the rice container.

2. A rice dispenser as claimed in claim 1 wherein the weighing mechanism includes an eccentric mounted to a second motor, a follower coupled to the controller, and a rice dispensing assembly for driving the rice container to dispense rice, the follower being coupled to the rice dispensing assembly, the rice dispensing assembly having a sensor mounted therein for measuring the weight of rice.

3. A rice dispensing machine according to claim 2 wherein the rice dispensing assembly includes a first pivot link, a second pivot link, a third pivot link, a pivot bracket, a first pivot, a second pivot, and a tension spring, the follower is fixed to the first pivot link, and the first pivot link is connected to the first pivot; one end of the second rotating shaft connecting rod is connected with the first rotating shaft connecting rod, the other end of the second rotating shaft connecting rod is connected with the third rotating shaft connecting rod, the third rotating shaft connecting rod is also connected with the second rotating shaft, and the first rotating shaft and the second rotating shaft penetrate through the rotating shaft frame and are fixed on the rice container; one end of the tension spring is fixed on the rotating shaft frame, the second rotating shaft connecting rod extends out of the linkage plate in an included angle mode, and the other end of the tension spring is fixed on the linkage plate.

4. A rice dispenser as recited in claim 3, wherein the rice dispensing assembly further includes a slot couple mounted to the body frame, the slot couple being connected to the controller.

5. The rice dispensing machine of claim 4 wherein the rice dispensing assembly further comprises a limiting member disposed at a horizontal included angle between the second pivot link and the linkage plate to limit movement of the second pivot link.

6. A rice dispensing machine as recited in claim 5 wherein the rice container includes two arcuate bowls forming a semi-circular rice container, the first and second shafts being disposed at opposite ends of the semi-circular shape of the rice container.

7. A rice dispensing machine as recited in claim 6 further comprising a first shaft lock for securing the first shaft to the rice container and a second shaft lock for securing the second shaft to the rice container.

8. A rice dispensing machine as recited in claim 1 wherein the gears include a first drive wheel, a second drive wheel coaxial with the first drive wheel, a first driven wheel, a second driven wheel, a third driven wheel, and a fourth driven wheel; the first driving wheel and the second driving wheel are connected with the first motor, the first driving wheel is connected with the first driven wheel, and the first driven wheel is connected with the first gear of the material stirring rod and the second gear of the material feeding rod so as to drive the material stirring rod and the material feeding rod to rotate; the second driving wheel, the second driven wheel, the third driven wheel and the fourth driven wheel are sequentially connected, and the fourth driven wheel is connected with the third gear of the material distributing rod to drive the material distributing rod to rotate.

9. A rice dispensing machine as recited in claim 1 further comprising a take-up pan disposed below the rice container, the take-up pan including two opposed switches and a placement area, the opposed switches being disposed on opposite sides of the placement area.

10. A rice dispensing machine as recited in claim 1 wherein the upper hopper is provided with a lower hopper adjacent the lower hopper, the lower hopper being arcuate and receiving the dispensing bar.

Technical Field

The invention relates to a rice distributor, and belongs to the field of catering equipment.

Technical Field

The existing rice distribution machine generally comprises a main body frame, wherein a rice storage device, a rice loosening mechanism, a rice distribution mechanism, a rice discharging mechanism and the like are sequentially arranged on the inner side of the main body frame from top to bottom, and the rice distribution machine replaces the repeated and fussy operation of distributing rice by an operator due to the arrangement of auxiliary devices of the rice loosening mechanism, the rice distribution mechanism, the rice discharging mechanism and the like. And manual measurement is inaccurate. Sometimes too much, resource waste can be caused; but the shortage will lead the diner to have dissatisfaction, which is not beneficial to improving the service quality.

Disclosure of Invention

The invention provides a rice distributing machine which can improve the rice distributing efficiency and accuracy.

In order to solve the above technical problem, an embodiment of the present invention provides the following technical solutions:

an embodiment of the present invention provides a rice dispenser, including a main body frame, including: the rice storage hopper, the rice distribution conveying mechanism, the quantitative rice distribution mechanism and the control assembly are arranged on the main body frame;

the rice storage hopper comprises an upper hopper and a lower hopper;

the control assembly comprises a controller and a first motor connected with the controller;

the rice distribution conveying mechanism is arranged in the upper hopper and comprises a stirring rod, a feeding rod positioned below the stirring rod and a distribution rod positioned below the feeding rod, the distribution rod is also positioned at a feed inlet of the lower hopper, and the stirring rod, the feeding rod and the distribution rod are connected with the first motor through gears so as to drive the stirring rod, the feeding rod and the distribution rod to rotate when the first motor rotates;

the quantitative rice distribution mechanism comprises a rice container and a weighing mechanism, the rice container is located below the lower funnel and is right opposite to the discharge hole of the lower funnel, and the weighing mechanism is connected with the rice container and is used for quantitatively weighing rice in the rice container.

Further, the weighing mechanism comprises an eccentric wheel, a second motor, a follower and a rice distribution assembly for driving the rice container to distribute rice, the eccentric wheel is mounted on the second motor, the second motor is connected with the controller, the follower is connected with the rice distribution assembly, and a sensor for measuring the weight of the rice is mounted in the rice distribution assembly.

Furthermore, the meal distribution assembly comprises a first rotating shaft connecting rod, a second rotating shaft connecting rod, a third rotating shaft connecting rod, a rotating shaft frame, a first rotating shaft, a second rotating shaft and a tension spring, the follower is fixed on the first rotating shaft connecting rod, and the first rotating shaft connecting rod is connected with the first rotating shaft; one end of the second rotating shaft connecting rod is connected with the first rotating shaft connecting rod, the other end of the second rotating shaft connecting rod is connected with the third rotating shaft connecting rod, the third rotating shaft connecting rod is also connected with the second rotating shaft, and the first rotating shaft and the second rotating shaft penetrate through the rotating shaft frame and are fixed on the rice container; one end of the tension spring is fixed on the rotating shaft frame, the second rotating shaft connecting rod extends out of the linkage plate in an included angle mode, and the other end of the tension spring is fixed on the linkage plate.

Further, the rice distribution assembly further comprises a groove pair, the groove pair is installed on the main body rack, and the groove pair is connected with the controller.

Furthermore, the meal distribution assembly further comprises a limiting part, and the limiting part is arranged at the horizontal included angle between the second rotating shaft connecting rod and the linkage plate so as to limit the movement of the second rotating shaft connecting rod.

Further, the meal container comprises two arc-shaped bowls which form a semicircular meal container, and the first rotating shaft and the second rotating shaft are respectively arranged at two semicircular ends of the meal container.

Furthermore, the meal distribution assembly further comprises a first shaft lock and a second shaft lock, the first shaft lock is used for fixing the first rotating shaft on the meal container, and the second shaft lock is used for fixing the second rotating shaft on the meal container.

Further, the gear comprises a first driving wheel, a second driving wheel coaxial with the first driving wheel, a first driven wheel, a second driven wheel, a third driven wheel and a fourth driven wheel; the first driving wheel and the second driving wheel are connected with the first motor, the first driving wheel is connected with the first driven wheel, and the first driven wheel is connected with the first gear of the material stirring rod and the second gear of the material feeding rod so as to drive the material stirring rod and the material feeding rod to rotate; the second driving wheel, the second driven wheel, the third driven wheel and the fourth driven wheel are sequentially connected, and the fourth driven wheel is connected with the third gear of the material distributing rod to drive the material distributing rod to rotate.

Further, still including set up in the receiver below the meal container, the receiver includes two correlation switches and places the district, the correlation switch is located place the both sides in district.

Furthermore, a discharging hopper is arranged at the position, close to the lower hopper, of the upper hopper, is arc-shaped and is used for carrying the distributing rods.

The invention has the beneficial effects that: the gear is driven to operate through the first motor, the stirring rod, the feeding rod and the distributing rod which are connected with the gear also rotate, rice stirring military training is achieved, rice in the upper hopper is conveyed to the lower hopper, the lower hopper conveys the rice to the rice container, and the weighing mechanism connected with the rice container quantitatively weighs the rice so that the output rice is the needed rice, and the rice distributing efficiency is improved.

Reference numerals

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings, there is shown in the drawings,

FIG. 1 is a schematic view showing the structure of a main body frame of a rice dispensing machine according to an embodiment of the present invention;

FIG. 2 is a schematic view of a first structure of a quantitative rice dispensing mechanism according to an embodiment of the present invention;

FIG. 3 is a second schematic view of the quantitative rice-dispensing mechanism according to the embodiment of the present invention;

FIG. 4 is a first structural schematic view of a rice-dispensing conveying mechanism according to an embodiment of the present invention;

FIG. 5 is a second structural diagram of the rice-dispensing conveying mechanism according to the embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a discharging hopper according to an embodiment of the present invention;

FIG. 7 is a schematic view showing the structure of a housing of a rice dispensing machine according to an embodiment of the present invention;

FIG. 8 is a schematic view showing the structure of a cover plate of the rice dispensing machine according to the embodiment of the present invention;

FIG. 9 is a schematic structural diagram of B in FIG. 8 according to an embodiment of the present invention.

Wherein, A-main body frame; 1-upper funnel; 10-feeding a hopper; 11-lowest point; 12-a stop position; 2-lower funnel; 20-a feed inlet; 3-gear 30-first drive wheel; 31-a second capstan; 32-a first driven wheel; 33-a second gear; 34-a first driven wheel; 35-a second driven wheel; 36-a third driven wheel; 37-third gear; 38-fourth driven wheel; 4-quantitative rice distribution mechanism; 40-a rice container; 400-a first shaft lock; 401 — second shaft lock; 41-a second motor; 42-eccentric wheel; 43-follower; 44-a first spindle link; 45-a second spindle linkage; 450-linkage plate; 46-a third spindle linkage; 460-a slot couple; 47-a rotating shaft frame; 470-a sensor; 471-a limiter; 48-a tension spring; 490-a first shaft; 491-a second rotating shaft; 50-a circuit board; 51-a power supply; 53-a first electric machine; 6-stirring rod; 7-a feeding rod; 8-a material separating rod; 80-bumps; 9-a take-up pan; 90-correlation switch; 91-a placement area; 100-a housing; 101-a cover plate; 102-pressure spring; 103-cover plate shaft; 104-two connecting blocks; 105-a second pivot mount pin; 106-a first spindle bearing; 107-first pivot mount pin; 201-control screen; 202-proximity button.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 9, a cooked rice dispensing machine according to an embodiment of the present invention includes a main body frame a including: a rice storage hopper, a rice distribution conveying mechanism, a quantitative rice distribution mechanism 4 and a control component which are arranged on the main body frame A;

the rice storage hopper comprises an upper hopper 1 and a lower hopper 2;

the control assembly comprises a controller (not shown in the figure) and a first motor 53 connected with the controller; the control assembly comprises a circuit board 50 and a power supply 51, the power supply 51 is connected with the controller and the first motor 53 to supply power to the controller and the first motor 53, and the controller is installed on the circuit board 50.

The rice distribution conveying mechanism is arranged in the upper hopper 1 and comprises a stirring rod 6, a feeding rod 7 positioned below the stirring rod 6 and a distribution rod 8 positioned below the feeding rod 7, the distribution rod 8 is also positioned at the feed inlet 20 of the lower hopper 2, and the stirring rod 6, the feeding rod 7 and the distribution rod 8 are connected with the first motor 53 through gears 3 so as to drive the stirring rod 6, the feeding rod 7 and the distribution rod 8 to rotate when the first motor 53 rotates;

the quantitative rice distribution mechanism 4 comprises a rice container 40 and a weighing mechanism, wherein the rice container 40 is positioned below the lower funnel 2 and is opposite to a discharge hole (not shown) of the lower funnel 2, and the weighing mechanism is connected with the rice container 40 and quantitatively weighs rice in the rice container 40, so that the rice distribution efficiency of the rice distribution machine is improved, and the continuous supply of the rice is ensured.

Illustratively, the weighing mechanism comprises an eccentric wheel 42, a second motor 41, a follower 43 and a rice dispensing assembly for driving the rice container to dispense rice, wherein the eccentric wheel 42 is mounted on the second motor 41, the second motor 41 is connected with the controller, the follower 43 is connected with the rice dispensing assembly, and a sensor 470 for measuring the weight of the rice is mounted in the rice dispensing assembly. The sensor 470 is preferably a gravity sensor.

Specifically, the sensor 470 transmits the weight of the rice in the rice container 40 to the controller in real time, and the controller decelerates the second motor 41 when detecting that the weight of the rice in the rice container 40 is close to the preset weight; when it is detected that the rice in the rice container 40 reaches a preset weight, the second motor 41 stops operating. When the second motor 41 does not operate, an interval is reserved between the eccentric wheel 42 and the follower 43, when the second motor 41 operates, the eccentric wheel 42 is in contact with the follower 43 to drive the follower 43 to operate, the rice distribution component connected with the follower 43 is linked to realize the rice distribution operation, and after the rice distribution is finished, the eccentric wheel 42 is not in contact with the follower 43.

Illustratively, the meal distribution assembly comprises a first rotating shaft connecting rod 44, a second rotating shaft connecting rod 45, a third rotating shaft connecting rod 46, a rotating shaft frame 47, a first rotating shaft 490, a second rotating shaft 491 and a tension spring 48, wherein the follower 43 is fixed on the first rotating shaft connecting rod 44, and the first rotating shaft connecting rod 44 is connected with the first rotating shaft 490; one end of the second rotating shaft connecting rod 45 is connected with the first rotating shaft connecting rod 44, the other end of the second rotating shaft connecting rod 45 is connected with the third rotating shaft connecting rod 46, the third rotating shaft connecting rod 46 is also connected with the second rotating shaft 491, and the first rotating shaft 490 and the second rotating shaft 491 pass through the rotating shaft bracket 47 and are fixed on the rice container 40; one end of the tension spring 48 is fixed on the rotating shaft frame 47, the second rotating shaft connecting rod 45 extends out of the linkage plate 450 in an included angle mode, the other end of the tension spring 48 is fixed on the linkage plate 450, and the linkage plate 450 is placed on the rotating shaft frame 47.

Specifically, when the second motor 41 is operated, the eccentric wheel 42 is driven to operate, and contacts the follower 43, and the first rotating shaft connecting rod 44, the second rotating shaft connecting rod 45 and the third rotating shaft connecting rod 46 connected with the follower 43 are driven to rotate in a linkage manner: the follower 43 moves away from the second rotating shaft connecting rod 45, the first rotating shaft connecting rod drives 44 the second rotating shaft connecting rod 45 to move close to the third rotating shaft connecting rod 46, the third rotating shaft connecting rod 46 moves close to the second rotating shaft connecting rod 45 to move close to the second rotating shaft connecting rod 45, and the tension spring 48 moves towards the third rotating shaft connecting rod 46 under the drive of the second rotating shaft connecting rod 45; so as to drive the first rotating shaft 490 and the second rotating shaft 491 to rotate relatively, and turn over the two arc bowls of the rice container 40 to be splayed, so that the rice falls into the bowls. The two arc bowls stop turning after turning to a certain angle, then rotate in the opposite direction, when the concave part of the second rotating shaft connecting rod 45 contacts the limiting piece 471, the follower 43 resets, and the second motor 41 stops after rotating for a short section, so that the follower 43 is completely separated from the eccentric wheel 42, and the accuracy of the weight of the rice in the rice container 40 is ensured.

Illustratively, the rice distribution assembly further comprises a slot pair 460, the slot pair 460 is a U-shaped photoelectric switch, the slot pair 460 is mounted on the main body frame a, and the slot pair 46 is connected with the controller. When the third rotating shaft connecting rod 46 rotates from being far away from the second rotating shaft connecting rod 45 to being close to the second rotating shaft connecting rod 45, one end of the third rotating shaft connecting rod 46 is embedded into the U-shaped groove of the slot pair 460, and when the reset of the third rotating shaft connecting rod 46 is detected, the slot pair 460 sends a signal to the controller, so that the second motor 41 stops after being decelerated, and the closing of the rice container 40 is realized to perform the next rice distribution operation.

Exemplarily, the meal distribution assembly further includes a limiting member 471, the limiting member 471 is disposed at a horizontal included angle between the second rotating shaft connecting rod 45 and the linkage plate 450, and the other end of the horizontal included angle of the second rotating shaft connecting rod 45 is also disposed at an included angle, and forms a concave shape with the horizontal included angle of the linkage plate 450, so as to limit the movement of the second rotating shaft connecting rod 45.

Illustratively, the rice container 40 includes two arc bowls, the two arc bowls form a semicircular rice container 40, and the first rotating shaft 490 and the second rotating shaft 491 are respectively disposed at two ends of the semicircular shape of the rice container 40. When the first rotating shaft 490 and the second rotating shaft 491 rotate relatively, the openings of the two arc bowls are driven to close, and the closed positions are opened, so that the rice in the rice container 40 is dispensed.

Illustratively, the rice-separating assembly further comprises a first shaft lock 400 and a second shaft lock 401, wherein the first shaft lock 400 is used for fixing the first rotating shaft 490 on the rice container 40, and the second shaft lock 401 is used for fixing the second rotating shaft 491 on the rice container 40. The first rotating shaft 490 passes through the first shaft lock 400 to be fixed, and the second rotating shaft 491 passes through the second shaft lock 401 to be fixed, which is not limited in this embodiment.

Illustratively, the gear 3 includes a first driving wheel 30, a second driving wheel 31 coaxial with the first driving wheel 30, a first driven wheel 32, a second driven wheel 35, a third driven wheel 36 and a fourth driven wheel 38; the first driving wheel 30 and the second driving wheel 32 are connected with the first motor 53, the first driving wheel 30 is connected with the first driven wheel 32, and the first driven wheel 32 is connected with the first gear 34 of the stirring rod 6 and the second gear 33 of the feeding rod 7 so as to drive the stirring rod 6 and the feeding rod 7 to rotate; the second driving wheel 31, the second driven wheel 35, the third driven wheel 36 and the fourth driven wheel 38 are sequentially connected, the fourth driven wheel 38 is connected with the third gear 37 of the material distribution rod 8 to drive the material distribution rod 8 to rotate, and the first driven wheel 32 and the second driven wheel 35 can freely rotate. Since the first driving wheel 30 and the second driving wheel 31 are coaxial, the stirring rod 6, the feeding rod 7 and the distributing rod 8 rotate in the same direction, and the speed ratio is preferably 1:1.83:3.46, so that rice in the upper funnel 1 is conveyed into the lower funnel 2.

Illustratively, the main frame a further comprises a material receiving tray 9 disposed below the meal container 40, wherein the material receiving tray 9 comprises two opposite switches 90 and a placing area 91, and the opposite switches 90 are disposed on two sides of the placing area 91. When being blocked light between the transmitter and the receiver of correlation switch 90 by meal container 40, correlation switch 90 just produces switching signal, and correlation switch 90 is used for detecting whether having the object placing area 91, if the user does not place the bowl, meal container 40 just can not open, avoids extravagant.

Illustratively, a lower hopper 10 is arranged on the upper hopper 1 near the lower hopper 2, and the lower hopper 10 is arc-shaped and receives the distributing rod 8. The lower hopper 10 adopts a structure similar to a funnel from top to bottom, and can ensure the complete light discharge of the rice. The material separating rod 8 is preferably a corn wheel, the surface of the material separating rod is provided with a plurality of salient points 80, rice in one row can be dispersed into three rows, the relative rice discharging amount during rotation is reduced, and the controller can control the weight more accurately. The lower funnel 1 and the upper funnel 2 adopt circular arc transition, and the end position 12 of the circular arc must exceed the lowest point 11 of the circular arc, thereby preventing rice grains between the salient points 80 from uncontrollably falling due to gravity; the rice grains must be pushed to the stopping point by the salient points 80 and then fall down, so that the effect of accurate rice falling is achieved.

Illustratively, the rice dispenser further comprises a housing 100 for placing the main body frame A, and a cover plate 101, wherein the cover plate 101 is arranged on the housing 100 through a cover plate shaft 103; the casing 100 further includes a first connecting block 107, a second connecting block 104 and a compression spring 102, the first connecting block 107 is fixed to the cover plate 101 through a first rotating shaft support pin 106, the second connecting block 104 is connected to the casing 100 through a second rotating shaft support pin 105, and the compression spring 102 is disposed between the first rotating shaft support pin 106 and the second rotating shaft support pin 105. When the first rotating shaft bracket tip 106, the second rotating shaft bracket tip 105 and the cover plate shaft 103 are on the same axis, the cover plate 101 is a critical point of the pressure spring 102, and the cover plate 101 can be fixed so as to load rice into the upper hopper 1; when the cover plate 101 is pressed towards the casing 100, the pressure spring 102 provides a force for closing the cover plate 101, so that the cover plate 101 is tightly closed on the casing 100, and a good heat preservation effect is achieved.

Illustratively, the main body frame A further comprises a control screen 201 and an approach button 202, and the control screen 201 and the approach button 202 are connected with the controller. The weight of the rice in the rice storage hopper at this time can be displayed on the control screen 201 for the user to select, the user selects the weight of the rice through the approach button 202, and after the selection is finished, the controller turns on the first motor 53 to convey the rice.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.